Improvement in swaging-tools for boiler-tubes



, IRA S.HAMILTON.

Improvement in Swaging Tools for Boiler Tubes.

Patented Dec. 5,1871.

ak t test 4 @Mfl I UNITED [RA S. HAMILTON, OF HAMILTON, OHIO, ASSIGNOR TO HIMSELF AND OWENS, LANE, DYER & 00., OF SAME PLACE.

IMPROVEMENT IN SWAGING-TOOLS FOR BOILER-TUBES.

Specification forming part of Letters Patent No. 121,512, dated December 5, 1871.

' composed of a spindle adapted to revolve within the tube, fitted at right angles to its axis, with swaging-rollers grooved on the peripheries, the spindle being arranged to feed toward the work by any suitable device, and revolve by hand or power, in such a way as to cause the rollers to form a bead on the end of the tube.

Figure 1 is a perspective view of my device. Fig. 2 is an axial section of the same.

A represents a boiler-head with one flue in place properly beaded. O is a spindle, constructed of a size to snugly fit the tube to be headed. It terminates at the outer end in a hardened center, 0, which is adapted to rotate against the stationary device which feeds it forward. The latter may consist of a cross-bar and feeding-screw supported by the boiler-head, such as is used in connection with ratchet-drills, 85c. Apart of the spindle O is formed square for the introduction of a wrench to operate the tool. Two spindles, D D, are inserted in spindle G at right angles to the latter, each being journaled at one end within the spindle O, and at the opposite end in projecting bearings E E. The spindle may be so constructed that the bearings E E may be cast or otherwise formed in one piece with the spindle, or the bearings may be in separate pieces rigidly secured to the spindle. The small spindles D D may have bearings in the spindle of the full diameter, as shown, or the bearings may be small, similar to those shown at E Be tween the bearings E E and the spindle O the spindles D D are provided with grooves d, of a size and shape corresponding with the shape and size of the bead required upon the end of the tube to be beaded.

In the operation of this tool the spindle O is first inserted in the tube to be beaded and the device employed to form the support and feed the spindle to the work is adjustedin place. The spindle O is then turned by a wrench or otherwise, and in this rotary action the bead is formed upon the tube by means of the grooved rollers D D d, which revolve in the bearings as the spindle O is rotated.

I claim- The improved tool, constructed substantially Witnesses:

FRANK MILLWARD, ELITHA F. LAYMAN. (163) 

